Cross-ribbed unitary safety surface tile



FIG. 1 is a bottom perspective view of a cross-ribbed unitary safety surface tile showing my new design;

FIG. 2 is a side elevation view thereof (views of all four sides being identical);

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a top plan view thereof.

The broken lines in the drawings depict portions of the cross-ribbed unitary safety surface tile that form no part of the claimed design. 

CLAIM The ornamental design for a cross-ribbed unitary safety surface tile, as shown and described. 